<template>
	<view>
		<!-- 搜索栏 -->
		<view class="search-box">
			<uni-search-bar @input="fuck" placeholder="请输入搜索内容" :radius="18" cancelButton="none"></uni-search-bar>
		</view>
		<!-- 搜索联想建议 -->
	<view class="sugg-list" v-if="searchResults.length!==0 && kw!==''">
		<view class="sugg-item"  v-for="(item,index) in searchResults" :key="index" @click="gotoDetail(item)">
		<uni-icons type="search" size="17"></uni-icons>
		<view class="goods-name">{{item.goods_name}}</view>
		</view>
	</view>
	<!-- 搜索历史记录 -->
	<view class="history-box" v-else>
		<!-- 标题 -->
		<view class="history-title">
			<text>搜索历史</text>
			<uni-icons @click="clean" type="trash" size="17"></uni-icons>
		</view>
		<!-- 列表 -->
		<view class="history-list">
			<uni-tag @click="gotoGoodsList(item)" :text="item" v-for="(item,index) in historyList" :key="index"></uni-tag>
		
		</view>
	</view>
	
	
	</view>
</template>

<script>
	export default {
		data() {
			return {
				// 延时器
				timer: null,
				// 关键词
				kw: ' ',
				searchResults: [],
				historyList:['a','abc','apple']
			};
		},
		methods: {
			async getSearchList() {
				if (this.kw === '') {
					this.searchList = []
					return
				}
				const {data: res} = await uni.$http.get('/api/public/v1/goods/qsearch', {query: this.kw})
				if (res.meta.status !== 200) return uni.$showMsg()
				this.searchResults = res.message
				
				this.saveSearchHistory()
			},
			//添加搜索历史
			saveSearchHistory(){
				// this.historyList.unshift(this.kw)
				const set = new Set(this.historyList)
				set.delete(this.kw)
				set.add(this.kw)
				this.historyList = Array.from(set)
				//搜索历史持久化
				uni.setStorageSync('kw',JSON.stringify(this.historyList))
			},
			//输入事件处理函数
			fuck(e) {
				clearTimeout(this.timer)
				this.timer = setTimeout(() => {
					this.kw = e
					this.getSearchList()
				}, 500)
			},
			gotoDetail(item){
				uni.navigateTo({
					url:'/subpkg/goods_detail/goods_detail?goods_id='+item.goods_id 
				})
			},
			clean(){
				this.historyList=[]
				uni.setStorageSync('kw','[]')
			},
			gotoGoodsList(kw){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?query='+kw
				})
			}
		},
		onLoad(){
			// 从本地持久化中取得搜索历史到historyList中
			this.historyList=JSON.parse(uni.getStorageSync('kw')||'[]')
		}
	}
</script>

<style lang="scss">
	.search-box {
		position: sticky;
		top: 0;
		z-index: 999;
	}
	.sugg-list{
		padding: 0 8px;
		.sugg-item{
			font-size: 12px;
			padding: 13px 0;
			border-bottom: 1px solid #efefef;
			display: flex;
			justify-content: flex-start;
			.goods-name{
				margin-left: 10rpx;
				white-space: nowrap;
				overflow: hidden;
				text-overflow: ellipsis;
				line-height: 50rpx;
				font-size: 25rpx;
			}
		}
	}
	.history-box{
		padding: 0 5px;
		.history-title{
			display: flex;
			justify-content: space-between;
			height: 40px;
			align-items: center;
			font-size: 13px;
			border-bottom: 1px solid #efefef;
		}
		.history-list{
			display: flex;
			flex-wrap: wrap;
			.uni-tag{
				margin-top: 5px;
				margin-right: 5px;
				background-color: 	#efefef;
				color: #000000;
			}
		}
	}
</style>
